Birthmarks are discolored areas on the skin that appear at birth or shortly after birth.
Most
birthmarks are not cause for concern. In most cases doctors don’t know
why birthmarks appear, and there is nothing that can be done to prevent
them.
Here's the list of the most rare birthmarks that challenged medical science:
1.
Zhang Hongming from Chongqing, south-eastern China, is nicknamed
“Chimpanzee.” He appealed to doctors for help in getting rid of the
thick black hair that covers part of his body. The man has a rare
birthmark that also covers a large part of his body.